Alright no one has really given this guy some guidance on his topic, if you have nothing good to contribute then dont post and stop over bumping this thread with the same type of comments.
You want to use the winhttp dll , its basically the dll to do the http post and get .
its very simple to use, i actually coded a function already using those functions to create a simple _POST and _GET function that has the ability to do https secure and much more.
Now what you want to do if you are doing this , i ve done it on a smaller scale like a few leads just to try it out but i would suggest that you go with using the browser such as internet explorer and you ofcourse avoid using proxies .
When you use a browser it looks more normal since you have javascript enabled, when you use the winhttp dll you cant really run javascript and remember some of those offers have google analytics, so thats something to think about.
If you have some more questions you can shoot me a pm and we can have a conversation about this. I suggest you dont post this too much here since its a thin line between fraud for most ppl and you will only get these kind of responses.